Magnetic dispersive solid-phase extraction using a zeolite-based composite for direct electrochemical determination of lead(II) in urine using screen-printed electrodes
Empreu sempre aquest identificador per citar o enllaçar aquest ítem
http://hdl.handle.net/10045/101368
Títol: | Magnetic dispersive solid-phase extraction using a zeolite-based composite for direct electrochemical determination of lead(II) in urine using screen-printed electrodes |
---|---|
Autors: | Fernández Martínez, Elena | Vidal, Lorena | Silvestre-Albero, Joaquín | Canals, Antonio |
Grups d'investigació o GITE: | Espectroscopía Atómica-Masas y Química Analítica en Condiciones Extremas | Materiales Avanzados |
Centre, Departament o Servei: | Universidad de Alicante. Departamento de Química Analítica, Nutrición y Bromatología | Universidad de Alicante. Departamento de Química Inorgánica | Universidad de Alicante. Instituto Universitario de Materiales |
Paraules clau: | ZSM-5 zeolite | Iron (III) oxide | Magnetic composite | Gold nanostructured carbon electrode | Heavy metal | Urine samples | Miniaturization | Multivariate optimization |
Àrees de coneixement: | Nutrición y Bromatología | Química Inorgánica |
Data de publicació: | 2-de gener-2020 |
Editor: | Springer Nature |
Citació bibliogràfica: | Microchimica Acta. 2020, 187:87. doi:10.1007/s00604-019-4062-9 |
Resum: | Magnetic dispersive solid-phase extraction (MDSPE) is combined with electrochemical detection by using a screen-printed carbon electrode modified with gold nanoparticles to determine lead(II). A zeolite-based magnetic composite was used as sorbent during sample preparation, thus combining the unique properties of zeolites as sorbent materials with the remarkable advantages provided by magnetic materials. Three different zeolite-based magnetic composites were initially investigated and characterized. ZSM-5/Fe2O3 treated with HNO3 (ZSM-5/Fe2O3(tr)) was finally selected as sorbent. Lead was extracted from urine samples using ZSM-5/Fe2O3(tr). After extraction, the phases were separated by using an external magnet. Subsequently, the magnetic composite carrying the analyte was directly deposited onto the working electrode of a modified screen-printed carbon electrode for final electrochemical detection. Thereby, the elution and detection of Pb(II) were carried out in a single step. A multivariate approach was employed to optimize the experimental parameters affecting extraction. Under optimized conditions and at a typical working potential of −0.23 V (vs. Ag pseudo-reference electrode), response is linear in the 0 to 25 μg L−1 Pb(II) concentration range. The empirical limit of detection ranged from 1.0 to 2.0 μg L−1. The method was used to analyze Pb(II)-spiked urine samples, and apparent recoveries ranged between 99 and 107%, with coefficients of variation of <20%. |
Patrocinadors: | The authors would like to thank the Spanish Ministry of Economy and Competitiveness and European Union (FEDER funds) (project n. CTQ2016-79991-R) for the financial support. |
URI: | http://hdl.handle.net/10045/101368 |
ISSN: | 0026-3672 (Print) | 1436-5073 (Online) |
DOI: | 10.1007/s00604-019-4062-9 |
Idioma: | eng |
Tipus: | info:eu-repo/semantics/article |
Drets: | © Springer-Verlag GmbH Austria, part of Springer Nature 2020 |
Revisió científica: | si |
Versió de l'editor: | https://doi.org/10.1007/s00604-019-4062-9 |
Apareix a la col·lecció: | INV - LMA - Artículos de Revistas INV - SP-BG - Artículos de Revistas |
Arxius per aquest ítem:
Arxiu | Descripció | Tamany | Format | |
---|---|---|---|---|
2020_Fernandez_etal_MicrochimActa_final.pdf | Versión final (acceso restringido) | 582,53 kB | Adobe PDF | Obrir Sol·licitar una còpia |
2020_Fernandez_etal_MicrochimActa_preprint.pdf | Preprint (acceso abierto) | 638,27 kB | Adobe PDF | Obrir Vista prèvia |
Tots els documents dipositats a RUA estan protegits per drets d'autors. Alguns drets reservats.